Agitating – Mixing chamber removable from stirrer and support – Support rectilinearly reciprocable only
Patent
1994-09-30
1995-12-05
Scherbel, David
Agitating
Mixing chamber removable from stirrer and support
Support rectilinearly reciprocable only
366347, A21C 102, A21C 114, B01F 1500
Patent
active
054722764
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to mixing machines, in particular to food mixers, of the kind having a mixing bowl, a bowl support and a mixing tool engageable with the contents of a mixing bowl supported by said bowl support.
Typically, food mixers of this kind comprise a base, a supporting structure upstanding from the base, mounting means at the upper end of the supporting structure movably supporting a mixer tool extending downwardly from the mounting means whereby the mixer tool can extend downwardly from the mounting means into a bowl of flowable product positioned, on the bowl support, adjacent the supporting structure, the mixer including driving means for said mixer tool adapted to produce a mixing movement of such a mixer tool in a bowl of flowable product so positioned. Such a mixer is herein referred to as being "of the kind specified".
In known mixers of the above type, the supporting structure upstanding from the base takes the form of a more or less rectangular vertical column from the upper end of which projects generally horizontally an arm which carries a drive system coupled with a mixer tool, for example in the form of a whisk, which extends vertically downwardly from the arm and is arranged for example simply to rotate about a vertical axis or to make an epicyclic rotational movement about a combination of vertical axes relative to said arm whereby the lower end of the mixing tool, extended into product within a bowl supported adjacent the column beneath the arm, can be made to mix the product in the bowl. Because of the need for the arm to project sufficiently far horizontally from the vertical column to be capable of being aligned substantially with the middle of the bowl below and because the engagement of the bowl rim with the vertical column defines the minimum horizontal distance from the middle of the bowl to said column, the horizontal arm must be relatively long in these known arrangements and consequently the arm and the vertical column must be made fairly heavy and robust in construction to avoid excessive flexure under the dynamic and static forces exerted by the stirring movements of the mixing tool and the weight of the drive system.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an improved food mixer having a relatively compact structure which can be made stiff enough to resist undue flexure in response to the forces arising during mixing.
According to one aspect of the invention there is provided a mixer comprising a base, a supporting structure upstanding from the base, mounting means at the upper end of said supporting structure movably supporting a mixer tool extending downwardly from said mounting means, the mixer including driving means for said mixer tool, whereby said mixer tool can extend downwardly from said mounting means into a bowl of a flowable food product and can be driven, by said driving means, to execute a mixing movement, in said product relative to said bowl, and wherein said supporting structure is provided with a recess which, in use, faces towards the zone of action of said mixing tool, said recess being adapted to receive part of the periphery of such a bowl positioned for mixing of the food product therein by said mixing tool.
In mixers of the kind specified, the bowl support, in addition to supporting the bowl at the required level during mixing, and lifting the bowl up into cooperation with the mixing tool and lowering it away from the mixing tool, is required to restrain the bowl from rotation with the mixing tool, or dislodgement, such as might occur otherwise where a particularly stiff product is being mixed, or the bowl, with a particularly adherent mix therein, is being lowered from the bowl's working position. Furthermore, for safety reasons, it is desirable to ensure that the bowl cannot be removed from the machine by personnel when the bowl is in the raised or operating position.
It is another object of the invention to provide means whereby a mixing bowl can be reliably located and
REFERENCES:
patent: 1264128 (1918-04-01), Rataiczak et al.
patent: 1743271 (1930-01-01), Gould
patent: 1761237 (1930-06-01), Schiff
patent: 2024282 (1935-12-01), Geiger
patent: 5348393 (1994-09-01), Pappas, Jr.
Best Gary M.
Kitchen Charles N.
Ratermann Philip A.
Redman Randall L.
Cooley Charles E.
Premark FEG Corporation
Scherbel David
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